I changed into my swimming costume and went into the pool. After about 10 mins I could see a stunning girl coming towards the pool with a bathrobe on.... I was pretty astonished to see it was Riya . I controlled myself and said hi to her continued with my swimming. She sat on the pool bench for 5 mins and was staring at me. I had a good body as workout regularly. Not the 6 pack abs types but not bad too. She removed the bathrobe and my jaw went wide open to see a perfectly structured girl in her. He undid Joyce's ankles, and then her cuffs, Carol turned so he could unlock her wrists as well, but Bill pushed her back onto the bed."Oh no, my little ravisher," he told her, "time you got what is coming to you." He and Joyce took a leg each, pulling them wide and securing them to the corners of the bed, so Carol could not close them more than a few inches. He stroked his fingers along Carol's wet slit, probing gently, then rubbing until she was squirming.Joyce sat at the side of her. I was more than a little turned on by seeing my brother get hard looking at my ass. I got more nervous as he walked up to my bed. "Leave me alone. I'm trying to sleep" I said turning away from him still leaving my ass partly uncovered. I jumped as I felt his rough fingers slide across the back of my thigh. "What the hell? Eww is that cum?" He asked. "No, it's just body wash" I insisted keeping my face turned away from him. "I thought I heard somebody fucking, I could have sworn it sounded like. Let's try a size down," she offers. I go back into the changing room and take off the loose pants. There's a little knock on the door. "You okay in there?" "Yep," I say. "You know.. it's only fair if I..." she says. "Yeah?" I'm in my underwear and a t-shirt, so I open the door just a crack. "Only fair if..?" I say with a little confused smile. She eases the door open and slips into the changing room with me.Nervously, she stands in front of me and puts her hands around the waistband of her.